I remind myself of Conservation of Expected Evidence most days I'm at work.

I'm an engineer, and it helps remind me that a data point can either support a hypothesis or that hypothesis's opposite, but not both at once. This is especially useful for explaining things to non-technical people.

I think learning more about rationalization, akrasia, and so forth, has made it easier for me to keep regularly going to the gym, by noticing when I'm just making excuses for being lazy, etc.

I really should start working on applying akrasia techniques, but I just haven't the willpower :P

That aside, I regularly remind myself to not be like Bruce in games like Risk and Magic, and probably in some other actives where he might show. And, as I posted before on this thread, making use of tabooing words and learning how an algorithm feels from the inside have helped clear up discussions when they'd otherwise be going back and forth with no understanding.

I always enjoy these kinds of questions, because when I ask myself, I have a harder time finding areas where I use what I learned here, than I do when someone else asks.